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High performance liquid analyte sensing based on Bloch surface wave resonances in the spectral domain
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SYSNO ASEP 0549380 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High performance liquid analyte sensing based on Bloch surface wave resonances in the spectral domain Author(s) Hlubina, P. (CZ)
Gryga, M. (CZ)
Ciprian, D. (CZ)
Pokorný, Pavel (UPT-D) RID, SAI, ORCID
Gembalová, L. (CZ)
Sobota, Jaroslav (UPT-D) RID, ORCID, SAINumber of authors 6 Article number 107492 Source Title Optics and Laser Technology. - : Elsevier - ISSN 0030-3992
Roč. 145, January (2022)Number of pages 9 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords One-dimensional photonic crystal ; Bloch surface wave ; p- and s-polarized waves ; Spectral reflectance and phase ; Liquid analyte sensing ; Figure of merit Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) Method of publishing Open access Institutional support UPT-D - RVO:68081731 UT WOS 000707416300001 EID SCOPUS 85114036426 DOI 10.1016/j.optlastec.2021.107492 Annotation In this paper, we report a design of a truncated one-dimensional photonic crystal (1DPhC) comprising six bi-layers of TiO2/SiO2 with a termination layer of TiO2 to realize a highly sensitive liquid analyte sensor utiliz-ing Bloch surface wave (BSW) resonances in the spectral domain. We demonstrate that the BSW excitation shows up as a dip for both p- and s-polarized waves. Reflectance response for a p-polarized BSW is due to the spectral interference with maximum depth, and resonance thus obtained is comparable in magnitude with surface plasmon resonance (SPR). In the theoretical analysis, the spectral reflectance, phase difference and its derivative are determined for aqueous solutions of NaCl when the refractive index (RI) is changed in a range of 1.3330-1.3482. We revealed that the BSW resonances for the p-polarized wave give a sensitivity of 1602 nm per RI unit (RIU) and figure of merit (FOM) of 106 RIU-1, respectively. For an s-polarized BSW, they are increased to 1933 nm/RIU and 434 RIU-1, respectively. Moreover, the theoretical results are experimentally verified, and very good agreement is confirmed. The spectral responses for aqueous solutions of NaCl with the RI up to 1.3547 give for the p-polarized BSW a sensitivity of 2022 nm/RIU and FOM of 109 RIU-1, respectively, and using the spectral derivative of the BSW phase difference, the FOM is increased to 301 RIU-1. BSW based sensors with responses in both polarizations thus represent an effective alternative to SPR sensors with advantages including a higher FOM and mechanical robustness. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2023 Electronic address https://www.sciencedirect.com/science/article/pii/S0030399221005806?via%3Dihub
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